I know exactly what you're going through and you probably seen someone or heard some friends go through a cycle and thought "oh fuck yeah sounds like a great idea"
You're 19 man, your body is going through so many changes with growth, hormones and everything else in between it, believe me for someone who has trained for 4 years, those numbers aren't anywhere where they need to be
As a natty, you should easily be in the 2/3/4 bracket of bench/dead/squat before you think about injecting or orally putting chemicals in your body
Believe me man, I was so hype on the gain train but steroids aren't something you just naturally ease off.
If you aren't going to take advice, go to the docs and get your bloods done
That'll tell you your t levels and give you a guideline of how much you need.
Why test c and only 6 weeks?
Do you know about pct and AI's?
Do you have a reliable source?
What's your workout plan and diet like?
No one can stop you from doing this, but we all have been around the tracks enough to advise you that if you're asking these questions as you did, you probably aren't ready, as I was a while ago.
Best advice I ever got was the brutally harsh
Do research, have a solid foundation of a workout plan and diet, and go from there